Atomic Model
The Atom
Subatomic Particles
The Periodic Table
Random
100
Democritis called them "uncuttable".
What is atomos?
100
An atom is composed of these smaller particles.
What are subatomic particles?
100
The atomic number is equal to the number of _________ and ________ in an atom of a specific element.
What are protons and electrons?
100
Rows of the periodic table are called ______.
What are periods?
100
These are the vertical columns in the periodic table.
What are groups?
200
This scientist believed that atoms are made of even smaller particles.
Who is J.J. Thomson?
200
It is a positively charged subatomic particle found in the nucleus.
What is a proton?
200
How many electrons are in an atom of magnesium?
What is 12 electrons?
200
The three main divisions of the periodic table are: ____________, __________, and ___________.
What are metals, nonmetals, and metalloids?
200
These are the most unreactive group in the periodic table. (Specific name)
What are noble gases?
300
This scientist discovered these negative particles orbiting the nucleus in different energy levels.
Who is Niels Bohr?
300
It is a negatively charged subatomic particle that is found outside of the nucleus.
What is an electron?
300
How many neutrons are in an atom of tungsten?
What is 110 neutrons?
300
These group 1 elements are the most reactive metals.
What are alkali metals?
300
This means that metals can be hammered or rolled into thin, flat, sheets.
What is malleability?
400
This scientist determined that there is a third neutral particle in an atom.
Who is James Chadwick?
400
It is a neutral subatomic particle that is found in the nucleus.
What is a neutron?
400
A _______ of an element has the same number of protons and electrons but a different number of neutrons.
What is an isotope?
400
This group is the most reactive nonmetals. (Specific Name/Not Number)
What are halogens?
400
These elements have properties of metals and nonmetals.
What are metalloids?
500
This scientist determined that the nucleus has a positive charge from his famous "Gold Foil" experiment.
Who is Ernest Rutherford?
500
A subatomic particle that is the same size as a neutron.
What is a neutron?
500
How many protons, neutrons, and electrons are in an atom of lead?
What is 82 protons, 125 neutrons, and 82 electrons?
500
These elements are poor conductors of electricity and heat. They are brittle and dull.
What are nonmetals?
500
Lanthanides and Actinides are part of this group in the periodic table. (Specific name).
What are the transition metals?
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